Air heater



May 5, 1925 1,536,648

F. R. ARTHUR AIR HEATER Filed June 2, 1924 t t fl 2 in:

-! 26 59 f I A I 2 l 1 22 an 18 18 40 1 I j f i 14 .5- 8 FIGURE J.

as 8' FIGURE ,2

ZDQ 55 58' I 13 12' 8 1 m.

INVENTOR ATTORNEY l atented May '5. W25

Preur r ce.

FRANK It. ATEPTIIUR, F IJIOUNTAIN VIEW, CALIFORNIA.

Ana rrnnrnn.

Application filed June 2,

To all whom it mag concern:

Be it known that I, FRANK ARTHUR, a subject of the King of Great Britain, and a resident of Mountain View, in the county of Santa Clara and State" otCalifornia, have invented certain new and usefullmprove- Inents inAir Heaters, of which the following is a specification. i y f One object of the pr sent invention is to provide a heater of the character indicated that will quickly and effectively heat a large volume of air with a minimum consumption of fuel. i

Another object of the invention is to pro vide a heat-er .of the character indicated in which the path of travel. of the heated gases resulting from the tanning of fuel is so arranged relative to that of the air to be heated that substantially all of the heat of said heated gases is'extracted therefrom and absorbed by the air passing thereby.

It is. a further object to provide a device in which some oil the passages through which the heated gases pass are so constructed as to quickly transfer theheat from the heated gases to the air passing thereby, and in which some of the passages are so constructed as to store up heat for a relatively long period of time.

Finally, it is an object to provide a device of: the character indicated that will be simple in forniand construction, economical to manufacture, and highly efficient in its practical application.

In the drawing:-

Figure 1 is a vertical transverse section through my improved air heater.

Figure 2 is a section on line 2-2 of Figure 1. 4

Referring more particularly to the drawing, I show an annular chamber 1 formed of two cast iron plates as 2 and 3 having opposed annular flanges 1 and formed thereon. These flanges 4 and 5 form shoulders against which is arranged an annular sheet-iron element 6 forming a side wall for the ClltLIIlbQl',ltl16 three parts 2, 3 and 6 being securely bound together by bolts 7.

In the center of plate 2 is an opening 8 through which the products of combustion are discharged into chamber 1 by any suitable burner 9.

In the center of plate 3 is an annular opening 10 provided with upstanding flange 11 interiorly threaded as at 1'2. Radially arranged and equally spaced about central flange 35 threaded to receive 1924. $eria1 No. 717,269.

opening 10 are plurality of oval openings 13, each of said openings being provided with an upstanding flange as shown at 14-.

At 15 I show a third cast-iron plate provided with a central opening 16 and radially arranged openings 17 provided with dcpending flanges 18 these openings 16 and 17 being exactly the same in number, size and. conformatirn as the openings 10 and 13 in plate in opposed relation to flanges 14 on plate 3.

At 19 isshown a wrought or cast-iron pipe threaded into flange 11 around opening 10 in plate 3 and passing through opening 16 in plate 15. Pipe 19 is threaded upon its upper end to engage nuts 20 and 21 whereby to securely lasten the parts together.

The opposing flanges 14: and 18 around openings 13 and 17 in plates 3 and 15 are connected by sheet-iron pipes 29 these pipes fitting snugly over said flanges and preferably being welded thereto.

A fourth cast-iron plate is shown at 23.

provided with a depending flange 9A arranged inopposed relation to upstanding flange 25 on plate 15. Seated against flanges 2 1 and 25 is a sheet-iron element 26 forming the side wall of annular chamber 27, the two parts 1.5 and 23 being secured together by bolts 28.

Arranged on the upper surface of plate 15 1s an upstanding flange Q9 spaced a distance 'i rom wall 96 and yet enclosing the radially arranged openings 17, height exactly one-half the height or chamber 27. Flange 29 is separated at one point to make an opening 30, one portion of the flange being bent inwardly at an angle as Depending from the under side of plate 28 is an annular flange 32 corresponding exactly in size and conformation to flange 29, the

this flange having a opposing edges of the two flanges contacting when the plates 15 and are assembled to form a chamber 88. I

In the center of the plateQE-E is formed an opening 3 1 provided with an upstanding a cap 36 which has a mica window 37 therein.

A pipe for carrying away waste products of combustion is provided at 38 and is connected to chamber 27 at 39. Surrounding the structure above described is a shell 40 discharging through a perforated floor plate d1 into the room to be heate In operation the moment the gas is lighted 3, and the flanges 18boing arranged at the burner 9 the flame and heated gases and smoke fill chamber 1 and pass through pipes 19 and 22 into chamber 33, then discharge through opening 30 into chamber 27 Where they pass around to pipe 38 and thence to the atmosphere, the direction of travel being indicated by small arrows.

Since parts 6, 22 and 26 are of thin metal the air surrounding these parts is quickly heated and a circulation of Warm air into the room above is immediately set up. As the cast-iron parts 2, 3, 15 and 23 become heated they, of course, assist in heating the air passing through shell 40. ll hen the required temperature has been reached in the room the flame at 5.) may be lowered be *ause a great deal of the excess heat required to quickly heat the air in shell 40 has been stored up in plates 2, 3 and 15 and 23, and is now slowly released to maintain the air passing through shell 40 at the required temperature.

By passing the heated gases through the several pipes and then through and entirely around chamber before they are discharged from pipe practically all oi the heat units are extracted therefrom, rcnder ing the device highly etiicient in its practical application.

The central column of heated gases discharging into the upper chamber causes the columns discharging from the several pipes 22 to eddy in said upper chamber, thereby bringing them in contact with every portionof the Walls of said chamber.

This device is simple in construction, economical to manut'acture, and provides a large amount of heating surface relative to the cross-sectional area of the shell in which it is placed.

It is to be understood, of course, that While I have herein shown and described butone specific embodiment of my invention, changes in form, construction and method of operation may be made within the scope ot the appended claims.

I claim 1. In a heater of the character indicated, a pair of vertically spaced chamlerr, an axially arranged tube connecting; said chambers, a plurality of tubes spaced about said central tube and connecting said chambers, a chamber arranged Within the upper chamber and communicating therewith, and an outlet trou'i said upper chamber at a point remote from its communication with said inner chamber.

2. In a heater ot' the character indicated, a pair of vertically spaced chambers, having top and bottom Walls adapted to store heat and side walls adapted to quickly transmit heat therethrough, an axially arranged tube essee-s connecting said chambers, a plurality of tubes spaced about" said central tube and connecting said chambers, a chamber arranged Within the upper chamber and communicating therewith, and an outlet from said upper chamber at a point remote from its communication With said inner chamber. 3. In aheater of the character indicated, a pair of vertically spaced chambers having top and bottom Walls adapted to store heat and sidewalls adapted to quickly transmit heat therethrough; an axially arranged tube connecting said chambers, a. plurality of tubes of lOW heat storing characteristics spaced about said central tube and connect ing said chambers, a chamber arranged within said upper chamber and communicating" therewith, and an outlet from said upper chamber at a point remote from its communication with said inner chamber.

In a heater of the character indicated, a pair of vertically spaced chambers having top and bottom Walls of castmetal and side walls oi sheet metal, an axially-aligned tube connecting said chambers, a plurality ot sheet metal tubes spaced about Said central tube and connecting said chambers, a chamber arranged Within saidupper chamber and communicating therewitlnand an'outlet from said upper chamber at a point remote from its comnumicat-ion with said inner chamber.

In a heater otthe character indicated, a pair of vertically spaced chambers, the lower chan'iber comprisingtopv and bottom elements of cast metal spaced by a side Wallot' sheetmetal, and the upper chamber comprising top and bottom cast metal elements spaced by a side Wall of sheet metal and havingoppos'ed flanges arranard thereon a distance WltlilITSaltl spacing Wall and arranged tocontact at their opposing edges When assembled and llflVlilQWL passage therethrough, an outlet arranged insaid upper chamber at apoint remote from-said passage, an axially arranged-tube connect ing said chambers, and a'plurality of tubes saaced about said central tube and connecting said chambers.

6. In a heater of the character indicated, a pair of verticallyspa'ced chambers, an axially arranged tube'connecting said chambers, a plurality of tubes-spaced about said central tube and connecting said chambers, a. chamber arrangedwithinthe upper chamher and con'ununicating therewith and eu- COlllDtlSSlllQ' the ends of the-tubes connected to the said upper chamber. and an outlet from said upper chamber at a point remote from its communication with said inner chamber.

FRANK R. i ARTHUR; 

